I just installed a touchscreen head unit from a 2015 Xb (a Pioneer PT546-00140-BU) in my 2013 Xb, which works fine. Also hooked up a back-up camera with no problem. Now looking for a Navigation extension box to fit. The official matching box is the PT296-00140 Bespoke unit, which some of you out there weren't fond of. I see posts where owners successfully paired up newer Prius nav boxes with Entune, etc to the head unit I now have. Anybody have success stories with pairing up a newer nav box with their 546-00140 head unit?